T04Z Or Gt42 Roller Turbo For Street

[GrizzlyF6]

I just sold a 3540 with .70 front cover and T04 internals was capable of making 424 rwkw's in my auto so would possibly make 450ish with a manual, good set up for street cost me $2400 including custom intake and fitting etc and like *Beep* said fits up to stock manifold, currently upgrading to a 4094 set up with 6boost low mount, custom dump pipe and air intake to suit.... also good for the street but expensive in comparison.

Hoe does the gt4094 compare with a T04Z for power and spool up time?

[Boosted1]

Got a Dyno Graph?

ive got my run in dyno sheet, its only pushing 11.5 - 12 psi atm but still making 350rwkw. wait till we push it to 20psi

[Boosted1]

Hoe does the gt4094 compare with a T04Z for power and spool up time?

I would imagine that the gt4094 will come onto boost slighly later, but with a 6 boost manifold it would minimuse the turbo lag. it would be a small loss for the mid, top end the 4094 will deliver over the to4z. I believe rip hsv has a higher stall coverter too

[RIP_HSV]

Hoe does the gt4094 compare with a T04Z for power and spool up time?

Hasn't been tuned yet got a few other things on the go but the same set up in another car from MT made 450ish rwkws with 4094 and .86 rear housing... im going for a larger 1.06 rear housing so should make more top end power, haven't compared dyno graphs but I would say the T04 would come on a little earlier then the 4094 but wont make as much up top especially with larger housing fitted

C4 conversion and TCE 3500 stall Boosted1

Edited 29/01/11 03:14 AM by RIP_HSV

[RIP_HSV]

ive got my run in dyno sheet, its only pushing 11.5 - 12 psi atm but still making 350rwkw. wait till we push it to 20psi

Let us know when you get a result

[RAP1D]

Comparing those two turbos isn't a good comparison really.

To4z spec'd up to allow it's full HP is around 700hp, a gt42 spec'd up to it's max hp is around 1100hp at 30psi, with the z making 700hp on 20psi ( give or take)

so in reallity both turbos will make similar power on 20psi, just the z is right on it's maximum, but the 42 is starting to get into it's stride and can go up and see 400hp more, so loads of headroom if you want to go over 450kw later on.

This is one of the reasons why I put a gt45 on my G6ET, 460wks on 21psi with room to punch 30psi when the motor gets built.

Qik1 is totally right about having the correctly match and flowing system to eliminate as much lag as possible...

Anyone can buy the manifold and big turbo, bolt it all on and make big power, the hard stuff which is commonly overlooked, is reducing lag through many avenues during the hardware choice and the tuning and set up process.

ZF equipped cars will always cover up some lag from big turbos due to their fast gear change, good ratios and quick convertors.

4spds can get stuck at the wrong ratio/rpm which can put you right in a laggy spot, which wouldn't happen at slightly higher rpm, this is similar with T56 which has ratios better suited to smaller turbos.

Diff ratio change is another way to rid lag, even though going numerically higher in diff ratio will not change the motors static performance, it will keep the motor up higher in the rpm and bring the boost on fast all the time.

Anyone that's seen Rickys ute in action will know what I'm talking about there!

So there's alot more to think about and plan out when it comes to turbo upgrade choices.

As mentioned above, changing to a turbo that has different oil, water size fittings will add $$ to the job, different size inlet and outlets on the comp housing will add $$ in piping / fabrication, different inlet on the turbine housing usually means a new manifold ( unless your handy with welding and fab work) and then there's different flange for the dump pipe plus it's new position... So do the sums befor you jump into it.

For my own car, don't use less than a 1000hp turbo, but I like the massive kick up the bum you get from a really big turbo, and the never ending top end power delivery.

And if your cars tuned well in NA it will make a big turbo come on so much better... And E85 just adds to the party

Lag isn't an issue these days if the poeple sorting the car are up with it.

Also the GT51R is a nice turbo that can be set up to work very well, it's a good option.

[01txr]

Just think about this, didn't Blueboost run 9's with TO4z and internally standard BA?

If the To4z has the potenial to do that why bother going bigger.

As I also said on the street rolling mates Big Dollar GT45 setup, did not have the instant acceleration mine had and his huge top end did not help.

Only spinning mine to 6200rpm and felt so strong up high as if it wanted to spin alot higher.

It had it all over the factory Turbo, low, mid & topend.

I very happy, it's a great setup, just pity the BA Rods are so crap and spoilt my fun for now.

From stand still it was a very close match between our cars.

On the strip his ran 11.3's 136mph so it's no slouch.

Lots of wheel spin on that run also.

If you really want to run a large frame Turbo you need to run 4.1 or lower ratio gears and pull as much weight out of the car to help get it going.

I have own many cars with big top end power, and so many times been beaten by a car with less power because it made it lower in the rpm range. It's very hard to close up lost ground unless you have plenty of road.

[Ralph Wiggum]

Mines a TAZ manifold supplied by Hi Torque.

Didn't even need to bend any ps lines or any other stuffing around.

The hose is a 90degree I trimmed back to get right angle for the placement of the filter.

Battery is in boot, helps make more room for filter to breathe.

Even dump was a simple 2 90deg bends with WG pipe merge on bottom bend.

Mine you fitting the oil drain up is a bitch.

Have not fab a airbox as yet but there's no problem of making one to fit.

I have run Teflon braided lines for oil & coolant for turbo.

Hi mount manifold is the reason why you didnt have too change anything.

My setup is slighty more stealth and stock looking that yours. My filter is tucked away inside a nizpro air box too and all hosing is black too avoid any undue attention.

Will post up some pics in a couple of days

[icer]

wtf, 136mph and only ran a 11.3??? I see...

[dalts]

Just think about this, didn't Blueboost run 9's with TO4z and internally standard BA?

If the To4z has the potenial to do that why bother going bigger.

As I also said on the street rolling mates Big Dollar GT45 setup, did not have the instant acceleration mine had and his huge top end did not help.

Only spinning mine to 6200rpm and felt so strong up high as if it wanted to spin alot higher.

It had it all over the factory Turbo, low, mid & topend.

I very happy, it's a great setup, just pity the BA Rods are so crap and spoilt my fun for now.

From stand still it was a very close match between our cars.

On the strip his ran 11.3's 136mph so it's no slouch.

Lots of wheel spin on that run also.

If you really want to run a large frame Turbo you need to run 4.1 or lower ratio gears and pull as much weight out of the car to help get it going.

I have own many cars with big top end power, and so many times been beaten by a car with less power because it made it lower in the rpm range. It's very hard to close up lost ground unless you have plenty of road.

blueboost was running a 51r quite a bit larger than a t04z